<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!-- 
	Copyright (C) 2007, 2008, 2009, 2010, 2011. PARP Research Group.
	<http://perception.inf.um.es>
	University of Murcia, Spain.

	This file is part of the QVision library.

	QVision is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as
	published by the Free Software Foundation, version 3 of the License.

	QVision is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with QVision. If not, see <http://www.gnu.org/licenses/>.
-->

<html><head><meta http-equiv="content-Type" content="text/html;charset=UTF-8">
<title>QVision: Qt&#39;s Image, Video and Computer Vision Library</title>
<meta name="title" content="QVision" />
<meta name="dc.title" content="QVision" />
<meta name="url" content="http://perception.inf.um.es/QVision" />
<meta name="author" content="PARP Research Group - http://perception.inf.um.es" />
<meta name="revisit-after" content="30 DAYS"/>
<meta name="robots" content="index,follow"/>
<meta name="classification" content="*">
<meta name="rating" content="Safe For Kids">
<meta name="distribution" content="GLOBAL"/>
<meta name="description" content="Qt's Image, Video and Computer Vision Library"/>
<meta name="page-topic" content="Computer Vision research and prototype programming"/>
<meta name="geo.country" content="ES" />

<!--
Keywords:
By license:		open source, gnu, lgpl, gpl, free
By theme:		computer vision, image processing, robotics, programming, source, development
By usage:		library, toolkit, framework, prototype, application
By programming specs:	object oriented, c++, block programming, reusability, gui, graphical, parallel computing, high performance, GPU, prototyping
Interoperability with:	Qt, GSL, GNU Scientific library, OpenCV, CGAL, QWT, CUDA, mplayer, IPP, Intel Image Performance Primitives, blas, lapack
Functionallity:		image features, matrix algebra, projective geometry, mser, function minimization, function optimization, canny operator, harris operator, corner detection, performance evaluation, cpu usage, graphical interface
Main data-types:	matrix, vector, tensor, quaternion, image, polyline
Video sources:		webcam, camera, stream
Devices:		embedded, desktop computer, laptop, mini-laptop
Authors:		PARP research group. University of Murcia, Spain.
-->

<meta name="keywords" content="augmented reality, sfm, structure from motion, open source, gnu, lgpl, gpl, free, computer vision, image processing, robotics, programming, source, development, library, toolkit, framework, prototype, application, object oriented, c++, block programming, reusability, gui, graphical, parallel computing, high performance, GPU, prototyping, Qt, GSL, GNU Scientific library, OpenCV, CGAL, QWT, CUDA, mplayer, IPP, Intel Image Performance Primitives, blas, lapack, image features, matrix algebra, projective geometry, mser, function minimization, function optimization, canny operator, harris operator, corner detection, performance evaluation, cpu usage, graphical interface, matrix, vector, tensor, quaternion, image, polyline, webcam, camera, stream, embedded, desktop computer, laptop, mini-laptop, University of Murcia, Spain, PARP research group, vision por computador"/>
<meta http-equiv="keywords" content="augmented reality, sfm, structure from motion, open source, gnu, lgpl, gpl, free, computer vision, image processing, robotics, programming, source, development, library, toolkit, framework, prototype, application, object oriented, c++, block programming, reusability, gui, graphical, parallel computing, high performance, GPU, prototyping, Qt, GSL, GNU Scientific library, OpenCV, CGAL, QWT, CUDA, mplayer, IPP, Intel Image Performance Primitives, blas, lapack, image features, matrix algebra, projective geometry, mser, function minimization, function optimization, canny operator, harris operator, corner detection, performance evaluation, cpu usage, graphical interface, matrix, vector, tensor, quaternion, image, polyline, webcam, camera, stream, embedded, desktop computer, laptop, mini-laptop, University of Murcia, Spain, PARP research group, vision por computador"/>
<meta http-equiv="pragma" content="no-cache"/>
<meta http-equiv="title" content="QVision"/>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="tabs.css" rel="stylesheet" type="text/css" />
<link rel="shortcut icon" href="favicon.ico" />
</head><body>

<table width="100%"><tr>
	<td><a href="http://perception.inf.um.es/"><img src="parp.png" border="0" /> <big>PARP Research Group</big></a></td>
	<td align="right"><a href="http://www.um.es/"><big>Universidad de Murcia</big> <img src="um.png" border="0" /></a></td>
</tr></table>

<hr /><br />

<table width="95%" align="center"><tr><td>

<!-- Generated by Doxygen 1.6.3 -->
<script type="text/javascript"><!--
var searchBox = new SearchBox("searchBox", "search",false,'Search');
--></script>
<div class="navigation" id="top">
  <div class="tabs">
    <ul>
      <li><a href="index.html"><span>Main&nbsp;Page</span></a></li>
      <li><a href="pages.html"><span>Related&nbsp;Pages</span></a></li>
      <li><a href="modules.html"><span>Modules</span></a></li>
      <li><a href="annotated.html"><span>Classes</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
      <li>
        <div id="MSearchBox" class="MSearchBoxInactive">
          <form id="FSearchBox" action="search.php" method="get">
            <img id="MSearchSelect" src="search/search.png" alt=""/>
            <input type="text" id="MSearchField" name="query" value="Search" size="20" accesskey="S" 
                   onfocus="searchBox.OnSearchFieldFocus(true)" 
                   onblur="searchBox.OnSearchFieldFocus(false)"/>
          </form>
        </div>
      </li>
    </ul>
  </div>
  <div class="tabs">
    <ul>
      <li><a href="files.html"><span>File&nbsp;List</span></a></li>
      <li><a href="globals.html"><span>File&nbsp;Members</span></a></li>
    </ul>
  </div>
<h1>src/qvblockprogramming/qvprocessingblock.cpp</h1><a href="qvprocessingblock_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> *      Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group.</span>
<a name="l00003"></a>00003 <span class="comment"> *      &lt;http://perception.inf.um.es&gt;</span>
<a name="l00004"></a>00004 <span class="comment"> *      University of Murcia, Spain.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> *      This file is part of the QVision library.</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> *      QVision is free software: you can redistribute it and/or modify</span>
<a name="l00009"></a>00009 <span class="comment"> *      it under the terms of the GNU Lesser General Public License as</span>
<a name="l00010"></a>00010 <span class="comment"> *      published by the Free Software Foundation, version 3 of the License.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> *      QVision is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> *      but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00015"></a>00015 <span class="comment"> *      GNU Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> *      You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> *      License along with QVision. If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00026"></a>00026 
<a name="l00027"></a>00027 <span class="preprocessor">#include &lt;QDebug&gt;</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;QMutex&gt;</span>
<a name="l00029"></a>00029 <span class="preprocessor">#include &lt;QWaitCondition&gt;</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include &lt;QApplication&gt;</span>
<a name="l00031"></a>00031 
<a name="l00032"></a>00032 <span class="preprocessor">#include &lt;QVProcessingBlock&gt;</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include &lt;QVVideoReaderBlock&gt;</span>
<a name="l00034"></a>00034 
<a name="l00035"></a><a class="code" href="classQVProcessingBlock.html#a68ff2767d04f952f5654514145bb32d8">00035</a> <a class="code" href="classQVProcessingBlock.html#a68ff2767d04f952f5654514145bb32d8" title="Constructor for QVProcessingBlock class.">QVProcessingBlock::QVProcessingBlock</a>(<span class="keyword">const</span> QString name):<a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a>(name), numIterations(0), status(Running), triggerList(), minms(0)
<a name="l00036"></a>00036     {
<a name="l00037"></a>00037     qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::QVProcessingBlock(&quot;</span> &lt;&lt; name &lt;&lt; <span class="stringliteral">&quot;)&quot;</span>;
<a name="l00038"></a>00038     Q_ASSERT_X(qvApp != NULL, <span class="stringliteral">&quot;QVProcessingBlock::QVProcessingBlock()&quot;</span>, <span class="stringliteral">&quot;QVApplication object does not exist.&quot;</span>);
<a name="l00039"></a>00039     <span class="keywordflow">if</span> (qvApp == NULL)
<a name="l00040"></a>00040         {
<a name="l00041"></a>00041         QString str = <span class="stringliteral">&quot;QVProcessingBlock::QVProcessingBlock(): the QVProcessingBlock cannot be created before the QVApplication instance. Aborting.&quot;</span>;
<a name="l00042"></a>00042         std::cerr &lt;&lt; qPrintable(str) &lt;&lt; std::endl;
<a name="l00043"></a>00043         exit(1);
<a name="l00044"></a>00044         }
<a name="l00045"></a>00045 
<a name="l00046"></a>00046     addProperty&lt;int&gt;(<span class="stringliteral">&quot;max block iterations&quot;</span>, inputFlag | guiInvisible | internalProp, -1, <span class="stringliteral">&quot;Maximal number of iterations to execute block&quot;</span>);
<a name="l00047"></a>00047     maxIterations = getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;max block iterations&quot;</span>);
<a name="l00048"></a>00048 
<a name="l00049"></a>00049     addProperty&lt;bool&gt;(<span class="stringliteral">&quot;stats enabled&quot;</span>, inputFlag | guiInvisible | internalProp, TRUE, <span class="stringliteral">&quot;Block CPU stats are enabled/disabled&quot;</span>);
<a name="l00050"></a>00050     statsEnabled = getPropertyValue&lt;bool&gt;(<span class="stringliteral">&quot;stats enabled&quot;</span>);
<a name="l00051"></a>00051 
<a name="l00052"></a>00052     <span class="keywordflow">if</span> (statsEnabled)
<a name="l00053"></a>00053         cpuStatControler = <span class="keyword">new</span> QVStatControler();
<a name="l00054"></a>00054 
<a name="l00055"></a>00055     <span class="keywordflow">if</span> (statsEnabled)
<a name="l00056"></a>00056         addProperty&lt;QVStat&gt;(<span class="stringliteral">&quot;cpu stats&quot;</span>, outputFlag, cpuStatControler-&gt;value(), <span class="stringliteral">&quot;CPU stats&quot;</span>);
<a name="l00057"></a>00057     <span class="keywordflow">else</span>
<a name="l00058"></a>00058         addProperty&lt;QVStat&gt;(<span class="stringliteral">&quot;cpu stats&quot;</span>, outputFlag, QVStat(), <span class="stringliteral">&quot;CPU stats&quot;</span>);
<a name="l00059"></a>00059 
<a name="l00060"></a>00060     informer.setParent(<span class="keyword">this</span>); <span class="comment">// set the informer&#39;s parent = this, in order to it will be moved to the block&#39;s thread when the qvApp do block-&gt;moveToThread(block)</span>
<a name="l00061"></a>00061 
<a name="l00062"></a>00062     addProperty&lt;int&gt;(<span class="stringliteral">&quot;stats printing frequency&quot;</span>, inputFlag | guiInvisible | internalProp, 0, <span class="stringliteral">&quot;Frequency to print CPU statistics (in iterations)&quot;</span>);
<a name="l00063"></a>00063     <span class="keyword">const</span> <span class="keywordtype">int</span> printStatsFrequency = getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;stats printing frequency&quot;</span>);
<a name="l00064"></a>00064 
<a name="l00065"></a>00065     <span class="keywordflow">if</span> (printStatsFrequency &gt; 0)
<a name="l00066"></a>00066         <a class="code" href="classQVProcessingBlock.html#af9896015375318688fb78012a08cddfb" title="Prints CpuStat object for the block.">setPrintStatsFrequency</a>(printStatsFrequency);
<a name="l00067"></a>00067 
<a name="l00068"></a>00068     qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::QVProcessingBlock(&quot;</span> &lt;&lt; name &lt;&lt; <span class="stringliteral">&quot;) &lt;- return&quot;</span>;
<a name="l00069"></a>00069     };
<a name="l00070"></a>00070 
<a name="l00071"></a><a class="code" href="classQVProcessingBlock.html#a1ead8ef597583070ddd3ec57b1154f05">00071</a> <a class="code" href="classQVProcessingBlock.html#a68ff2767d04f952f5654514145bb32d8" title="Constructor for QVProcessingBlock class.">QVProcessingBlock::QVProcessingBlock</a>(<span class="keyword">const</span> <a class="code" href="classQVProcessingBlock.html" title="Base class for Block threads.">QVProcessingBlock</a> &amp;other):QThread(), <a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a>(other), statsEnabled(other.statsEnabled), numIterations(other.numIterations),
<a name="l00072"></a>00072     maxIterations(other.maxIterations), status(other.status), triggerList(other.triggerList), iterationTime(other.iterationTime), curms(other.curms),
<a name="l00073"></a>00073     minms(other.minms)
<a name="l00074"></a>00074     {
<a name="l00075"></a>00075     <span class="keywordflow">if</span> (statsEnabled) cpuStatControler = <span class="keyword">new</span> QVStatControler();
<a name="l00076"></a>00076     }
<a name="l00077"></a>00077 
<a name="l00078"></a><a class="code" href="classQVProcessingBlock.html#aefcffc7b413c1640f4c1f0f245736f2d">00078</a> <a class="code" href="classQVProcessingBlock.html#aefcffc7b413c1640f4c1f0f245736f2d" title="Destructor for QVProcessingBlock class.">QVProcessingBlock::~QVProcessingBlock</a>()
<a name="l00079"></a>00079     {
<a name="l00080"></a>00080     <span class="keywordflow">if</span> (statsEnabled)
<a name="l00081"></a>00081         <span class="keyword">delete</span> cpuStatControler;
<a name="l00082"></a>00082 
<a name="l00083"></a>00083     informer.setParent(0); <span class="comment">// in order not to delete the informer object, when all its childrens will be deleted</span>
<a name="l00084"></a>00084     }
<a name="l00085"></a>00085 
<a name="l00086"></a>00086 <span class="comment">/*</span>
<a name="l00087"></a>00087 <span class="comment">void QVProcessingBlock::unlink()</span>
<a name="l00088"></a>00088 <span class="comment">    {</span>
<a name="l00089"></a>00089 <span class="comment">    if(status == Finished)</span>
<a name="l00090"></a>00090 <span class="comment">        QVPropertyContainer::unlink();</span>
<a name="l00091"></a>00091 <span class="comment">    else</span>
<a name="l00092"></a>00092 <span class="comment">        std::cerr &lt;&lt; &quot;WARNING: A block only can be unlinked if the block&#39;s status is Finished.&quot; &lt;&lt; std::endl;</span>
<a name="l00093"></a>00093 <span class="comment">    }</span>
<a name="l00094"></a>00094 <span class="comment">*/</span>
<a name="l00095"></a>00095 
<a name="l00096"></a>00096 <span class="keywordtype">void</span> QVProcessingBlock::run()
<a name="l00097"></a>00097     {
<a name="l00098"></a>00098     qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::run()&quot;</span>;
<a name="l00099"></a>00099 
<a name="l00100"></a>00100     <span class="keywordflow">while</span>(status != <a class="code" href="classQVProcessingBlock.html#a1a629009a666814593cd3f50198b24c5a24d46237cabfd686cbdb35b20b193baa" title="Block is finished. Execution thread ended.">Finished</a>)
<a name="l00101"></a>00101         {
<a name="l00102"></a>00102         qDebug() &lt;&lt; <span class="stringliteral">&quot;Processing events in block &quot;</span> &lt;&lt; qPrintable(<a class="code" href="classQVPropertyContainer.html#a82e880a6c160f3780bc8f7b822fbbd85" title="Retrieves identifier QString of the object.">getName</a>());
<a name="l00103"></a>00103 
<a name="l00104"></a>00104         <span class="comment">// First, we check if there are any pending signals, and if so, we</span>
<a name="l00105"></a>00105         <span class="comment">// execute their associated slots:</span>
<a name="l00106"></a>00106         qApp-&gt;processEvents();
<a name="l00107"></a>00107 
<a name="l00108"></a>00108         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::iterate(): iteration&quot;</span> &lt;&lt; numIterations;
<a name="l00109"></a>00109 
<a name="l00110"></a>00110         <span class="comment">// Avoids &quot;apparent hanging&quot; (greedy ocupation of CPU by extremely fast</span>
<a name="l00111"></a>00111         <span class="comment">// blocks, such as paused ones). It is just 1 millisecond, so</span>
<a name="l00112"></a>00112         <span class="comment">// it should not be appreciable in any practical situation.</span>
<a name="l00113"></a>00113         usleep(1000);
<a name="l00114"></a>00114 
<a name="l00115"></a>00115         <span class="keywordflow">switch</span> (status)
<a name="l00116"></a>00116             {
<a name="l00117"></a>00117             <span class="keywordflow">case</span> <a class="code" href="classQVProcessingBlock.html#a1a629009a666814593cd3f50198b24c5af2ff917aa66dc170044ea731082c50d7">RunningOneStep</a>:
<a name="l00118"></a>00118                 qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::iterate(): RunningOneStep&quot;</span>;
<a name="l00119"></a>00119                 status = <a class="code" href="classQVProcessingBlock.html#a1a629009a666814593cd3f50198b24c5a00db081e1975c5fe7b2896d0e3b9c2f7">Paused</a>;
<a name="l00120"></a>00120 
<a name="l00121"></a>00121             <span class="keywordflow">case</span> <a class="code" href="classQVProcessingBlock.html#a1a629009a666814593cd3f50198b24c5a5252ef1bbe4bd07e1fa66c7cf1f27d0e">Running</a>:
<a name="l00122"></a>00122                 iterationTime.start();
<a name="l00123"></a>00123                 <span class="keywordflow">foreach</span>(QList&lt;QVPropertyContainer *&gt; level, slavesByLevel) <span class="comment">// Iterate all its slaves (included itself)</span>
<a name="l00124"></a>00124                     <span class="keywordflow">foreach</span>(<a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a> * slave, level)
<a name="l00125"></a>00125                         <span class="keywordflow">if</span>(dynamic_cast&lt;QVProcessingBlock *&gt;(slave) != NULL) ((<a class="code" href="classQVProcessingBlock.html" title="Base class for Block threads.">QVProcessingBlock</a> *)slave)-&gt;blockIterate();
<a name="l00126"></a>00126 
<a name="l00127"></a>00127                 curms = iterationTime.elapsed();
<a name="l00128"></a>00128                 <span class="keywordflow">if</span>(minms &gt; curms)
<a name="l00129"></a>00129                     usleep(1000*(minms-curms));
<a name="l00130"></a>00130                 <span class="comment">/*if(numIterations!=1) // First iteration time is too noisy:</span>
<a name="l00131"></a>00131 <span class="comment">                    acumms = (acumms*(numIterations-2) + curms) / (numIterations-1);</span>
<a name="l00132"></a>00132 <span class="comment">                std::cout &lt;&lt; &quot;-----&gt; curms=&quot; &lt;&lt; curms &lt;&lt; &quot; acumms=&quot; &lt;&lt; acumms &lt;&lt; &quot;\n&quot;;*/</span>
<a name="l00133"></a>00133                 <span class="keywordflow">break</span>;
<a name="l00134"></a>00134 
<a name="l00135"></a>00135             <span class="keywordflow">case</span> <a class="code" href="classQVProcessingBlock.html#a1a629009a666814593cd3f50198b24c5a598549c56ecfbe02fbc7a71825bde564">Stopped</a>:
<a name="l00136"></a>00136                 <span class="comment">// A stopped block should never block anybody, but keeps linked to</span>
<a name="l00137"></a>00137                 <span class="comment">// other blocks (otherwise, it would simply be deleted). So, it must</span>
<a name="l00138"></a>00138                 <span class="comment">// read its inputs an write its outputs always, even being stopped.</span>
<a name="l00139"></a>00139                 <a class="code" href="classQVPropertyContainer.html#a386412d3d7d011283034086a89173f86" title="Read linked input properties from other QVPropertyContainer&amp;#39;s.">readInputProperties</a>();
<a name="l00140"></a>00140                 <a class="code" href="classQVPropertyContainer.html#a858a9653531337be74ffc081065bb31a" title="Write linked output properties to other QVPropertyContainer&amp;#39;s.">writeOutputProperties</a>();
<a name="l00141"></a>00141                 usleep(100); <span class="comment">// This avoids spurious CPU consuming when stopped.</span>
<a name="l00142"></a>00142                 <span class="keywordflow">break</span>;
<a name="l00143"></a>00143 
<a name="l00144"></a>00144 
<a name="l00145"></a>00145             <span class="keywordflow">case</span> <a class="code" href="classQVProcessingBlock.html#a1a629009a666814593cd3f50198b24c5a00db081e1975c5fe7b2896d0e3b9c2f7">Paused</a>:
<a name="l00146"></a>00146                 qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::iterate(): Paused&quot;</span>;
<a name="l00147"></a>00147                 <span class="keywordflow">if</span>(dynamic_cast&lt;QVVideoReaderBlock*&gt;(<span class="keyword">this</span>) != NULL)
<a name="l00148"></a>00148                     {
<a name="l00149"></a>00149                     <span class="comment">// A special pause case for camera blocks: we do not want paused cameras</span>
<a name="l00150"></a>00150                     <span class="comment">// to block linked blocks:</span>
<a name="l00151"></a>00151                     <a class="code" href="classQVPropertyContainer.html#a386412d3d7d011283034086a89173f86" title="Read linked input properties from other QVPropertyContainer&amp;#39;s.">readInputProperties</a>();
<a name="l00152"></a>00152                     <a class="code" href="classQVPropertyContainer.html#a858a9653531337be74ffc081065bb31a" title="Write linked output properties to other QVPropertyContainer&amp;#39;s.">writeOutputProperties</a>();
<a name="l00153"></a>00153                     }
<a name="l00154"></a>00154                 usleep(100); <span class="comment">// This avoids spurious CPU consuming when paused.</span>
<a name="l00155"></a>00155                 <span class="keywordflow">break</span>;
<a name="l00156"></a>00156 
<a name="l00157"></a>00157             <span class="keywordflow">case</span> <a class="code" href="classQVProcessingBlock.html#a1a629009a666814593cd3f50198b24c5a24d46237cabfd686cbdb35b20b193baa" title="Block is finished. Execution thread ended.">Finished</a>:
<a name="l00158"></a>00158                 qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::iterate(): Finished&quot;</span>;
<a name="l00159"></a>00159                 <span class="keywordflow">break</span>;
<a name="l00160"></a>00160             }
<a name="l00161"></a>00161 
<a name="l00162"></a>00162         <span class="keywordflow">if</span> (maxIterations != -1 &amp;&amp; numIterations &gt;= maxIterations)
<a name="l00163"></a>00163             <a class="code" href="classQVProcessingBlock.html#afacc54ae592d0b6da15476b6b9238499" title="Finish block execution.">finish</a>();
<a name="l00164"></a>00164 
<a name="l00165"></a>00165         qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::iterate() &lt;- return&quot;</span>;
<a name="l00166"></a>00166         }
<a name="l00167"></a>00167 
<a name="l00168"></a>00168 
<a name="l00169"></a>00169     <span class="keywordflow">foreach</span>(QList&lt;QVPropertyContainer *&gt; level, slavesByLevel) <span class="comment">// Return to the main thread all its slaves (included itselve)</span>
<a name="l00170"></a>00170         <span class="keywordflow">foreach</span>(<a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a> * slave, level)
<a name="l00171"></a>00171             <span class="keywordflow">if</span>(dynamic_cast&lt;QVProcessingBlock *&gt;(slave) != NULL) ((<a class="code" href="classQVProcessingBlock.html" title="Base class for Block threads.">QVProcessingBlock</a> *)slave)-&gt;moveToThread(qvApp-&gt;thread());
<a name="l00172"></a>00172 
<a name="l00173"></a>00173     <span class="keywordflow">foreach</span>(QList&lt;QVPropertyContainer *&gt; level, slavesByLevel) <span class="comment">// Unlink all its slaves (included itselve)</span>
<a name="l00174"></a>00174         <span class="keywordflow">foreach</span>(<a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a> * slave, level)
<a name="l00175"></a>00175             <span class="keywordflow">if</span>(dynamic_cast&lt;QVProcessingBlock *&gt;(slave) != NULL) {
<a name="l00176"></a>00176                 QMutexLocker locker(&amp;qvApp-&gt;mutex); <span class="comment">// in safe mode with other thread&#39;s unlinks and with the canvas viewer()</span>
<a name="l00177"></a>00177                 ((<a class="code" href="classQVProcessingBlock.html" title="Base class for Block threads.">QVProcessingBlock</a> *)slave)-&gt;unlink();
<a name="l00178"></a>00178             }
<a name="l00179"></a>00179 
<a name="l00180"></a>00180     qApp-&gt;processEvents();
<a name="l00181"></a>00181 
<a name="l00182"></a>00182     qDebug() &lt;&lt; <span class="stringliteral">&quot;QVProcessingBlock::run() &lt;- return&quot;</span>;
<a name="l00183"></a>00183     }
<a name="l00184"></a>00184 
<a name="l00185"></a>00185 <span class="keywordtype">void</span> QVProcessingBlock::blockIterate()
<a name="l00186"></a>00186     {
<a name="l00187"></a>00187     <span class="keywordflow">if</span> (statsEnabled) cpuStatControler-&gt;step();
<a name="l00188"></a>00188     emit <a class="code" href="classQVProcessingBlock.html#a2be02b18fe1e03a2dd3a51b589e61f69" title="Signal emited before each call to QVProcessingBlock::iterate() function.">startIteration</a>();
<a name="l00189"></a>00189     <a class="code" href="classQVPropertyContainer.html#a386412d3d7d011283034086a89173f86" title="Read linked input properties from other QVPropertyContainer&amp;#39;s.">readInputProperties</a>();
<a name="l00190"></a>00190     <a class="code" href="classQVProcessingBlock.html#a61f390e8790a77175a6d6e1049a9d127" title="Stablish a performance breakpoint in the execution of the block.">timeFlag</a>(<span class="stringliteral">&quot;System&quot;</span>);
<a name="l00191"></a>00191     <a class="code" href="classQVProcessingBlock.html#a0283c799776e0c938538de0b0ae6b463" title="Function to be defined in subclasses with processing code.">iterate</a>();
<a name="l00192"></a>00192     <span class="keywordflow">if</span> (statsEnabled) setPropertyValue&lt;QVStat&gt;(<span class="stringliteral">&quot;cpu stats&quot;</span>, cpuStatControler-&gt;value());
<a name="l00193"></a>00193     <a class="code" href="classQVPropertyContainer.html#a858a9653531337be74ffc081065bb31a" title="Write linked output properties to other QVPropertyContainer&amp;#39;s.">writeOutputProperties</a>();
<a name="l00194"></a>00194     numIterations++;
<a name="l00195"></a>00195     emit <a class="code" href="classQVProcessingBlock.html#a1924b55e68860c62099885a8700ef7ab" title="Signal emited after each call to QVProcessingBlock::iterate() function.">endIteration</a>(<a class="code" href="classQVPropertyContainer.html#a79e08d0500b8dcd0c15cdadb4e3d9a7e" title="Retrieves identifier uint of the object.">getId</a>(), <a class="code" href="classQVProcessingBlock.html#a95c56bae078a84bf689b7ee8073bcf7c" title="Function to obtain the number of iteration the block has performed.">getIteration</a>());
<a name="l00196"></a>00196     }
<a name="l00197"></a>00197 
</pre></div></div>
</td></tr></table>

<br /><hr><br />
<center><a href="http://perception.inf.um.es/QVision">QVision framework</a>.
<a href="http://perception.inf.um.es">PARP research group</a>.
Copyright &copy; 2007, 2008, 2009, 2010, 2011.</center>
<br />
</body>
</html>
